I had the same problem originally with FPSC, AVI are not a supported format as far as I could tell at the time with out some changing to the source code, same as mp3.
You can convert the avi to WMV and it will work just fine, my initial problem was the the AVI would play upside down! something to do with the codecs, even with the codecs updated it still came out wrong, so I downloaded a video converter, and as I said, WMV works fine! Just remember to remove the default sound file from the properties of the story zone too otherwise it plays over your video sound.
As for ogg files, I have noticed that ogg is only available for particular zones, not all?? I generally convert to WAV as I know for sure it is a supported format.
Not sure if this helps, hope it does.
Far too new to be helping...